SSH Daemon Jail 1sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.d/ssh.local 1[sshd] 2enabled = true 3 4ignoreip = 127.0.0.1/8 ::1,192.168.0.0/16 ::1 1sudo systemctl restart fail2ban 1sudo fail2ban-client status 1sudo fail2ban-client status sshd

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Basics Add your user to the audio group, and install festival-english. 1echo "(Parameter.set 'Audio_Method 'Audio_Command)" >> /usr/share/festival/voices.scm 1echo "(Parameter.set 'Audio_Command "aplay -q -c 1 -t raw -f s16 -r $SR $FILE")" /usr/share/festival/voices.scm Set Default Voice Edit ~/.festivalrc with (set! …

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Basics Translate a media file to a new type. ffmpeg -i [input file] output_file.mkv The input file might be a device, such as a camera. Record screen Take the format as 'grab the x11 screen'. 1ffmpeg -f x11grab -s [screensize] -i :0.0 out.mkv Get screensize with 1xrandr -q or maybe just... 1ffmpeg -f x11grab -s …

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Basics Update font-cache: 1su root 2fc-cache List fonts: 1fc-list Grab the part of the font name you need for Xresources: 1fc-list | cut -d: -f2 Add field 3 for styles.

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Basics The ordering of /etc/fstab is disk mount point filesystem type options dump pass Example: 1UUID=877f14e8-4738-46b0-884f-ba330dad1a7d /mnt/biggie ext4 nofail,rw,relatime 0 2 2 3UUID=B21648C416488AF5 /mnt/share ntfs nofail,rw,nosuid,nodev,user_id=0,group_id=0,allow_other,blksize=4096 0 0 5: Dump Ignore this …

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Starting New Machines 1git config --global user.email "$YOUR_EMAIL" 1git config --global user.name "$YOUR_NAME" New Git Decide on algorithm: If you're scared of insecure hash-sums, go with hash=sha256. If you don't know what a hash sum is, go with hash=sha1. Init the Git Start a git in directory ${DIR}: 1git init …

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Check out the sample hooks: 1cd $GIT_REPO 2ls .git/hooks 3head .git/hooks/pre-commit.sample Add a hook to check the shell scripts in $GIT_REPO before making a commit: 1echo '#!/bin/sh 2shellcheck *.sh' > .git/hooks/commit-msg 3chmod u+x .git/hooks/commit-msg Committing Your git hooks will not enter the repository, but …

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Save file-changes without committing anything. Change a file: 1file=README.md 2fortune >> ${file} 3git diff 4git stash save List which stashes you have: 1git stash list 2 3 stash@{1}: WIP on master: c21f102 init git Make a new file, then stash it: 1otherfile=file.log 2fortune > ${otherfile} 3git add ${otherfile} …

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Pulling a Subtree from an existing git The project has subdirectories sub-1, sub-2, sub-3. The first should be its own repository, but should also retain its own history. First, we extract its history as an independent item, and make that into a seprate branch. 1git subtree split --prefix=sub-1 -b sub If you want …

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Git Large File Storage ('LFS') needs to change your ~/.gitconfig to check out those binary files: 1cat ~/.gitconfig 2git lfs install 3cat ~/.gitconfig Then track some filetypes with: 1cd $git_repository 2ext=ttf 3git lfs track "*.$ext" Or a directory with: 1git lfs track "images/" Track the changes to .gitattributes: …

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